Identification and origins of neutral fecal sterols in adult Large White sows : occurrence of externally-secreted intestinal cholesterol Jocelyne AIGUEPERSE, C. LUTTON and F. CHEVALLIERReprod. Nutr. Dévelop., 21 4 (1981) 545-554DOI: https://doi.org/10.1051/rnd:19810406